Move the prepare processing of findpath to execute (#2303)

* Move prepare handle to execute

* address Shylock-Hg's comment

* modify cppLint

.github/workflows/pull_request.yaml

@@ -20,12 +20,10 @@ jobs:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 1
-      - uses: jitterbit/get-changed-files@v1
-        id: diff
       - name: Cpplint
         run: |
           ln -snf $PWD/.linters/cpp/hooks/pre-commit.sh $PWD/.linters/cpp/pre-commit.sh
-          .linters/cpp/pre-commit.sh ${{ steps.diff.outputs.all }}
+          .linters/cpp/pre-commit.sh $(git --no-pager diff --diff-filter=d --name-only HEAD^ HEAD)
 
   build:
     name: build

src/graph/FindPathExecutor.cpp

@@ -16,6 +16,10 @@ FindPathExecutor::FindPathExecutor(Sentence *sentence, ExecutionContext *exct)
 }
 
 Status FindPathExecutor::prepare() {
+    return Status::OK();
+}
+
+Status FindPathExecutor::prepareClauses() {
     spaceId_ = ectx()->rctx()->session()->space();
     Status status;
     expCtx_ = std::make_unique<ExpressionContext>();
@@ -71,6 +75,11 @@ Status FindPathExecutor::beforeExecute() {
             break;;
         }
 
+        status = prepareClauses();
+        if (!status.ok()) {
+            break;
+        }
+
         status = prepareOver();
         if (!status.ok()) {
             break;

src/graph/FindPathExecutor.h

@@ -53,6 +53,8 @@ class FindPathExecutor final : public TraverseExecutor {
     cpp2::RowValue buildPathRow(const Path &path);
 
 private:
+    Status prepareClauses();
+
     // Do some prepare work that can not do in prepare()
     Status beforeExecute();
 

src/graph/test/FindPathTest.cpp

@@ -559,6 +559,25 @@ TEST_F(FindPathTest, UseUUID) {
         ASSERT_TRUE(resp.get_rows() != nullptr);
         ASSERT_EQ(resp.get_rows()->size(), 1);
     }
+    {
+        // without use space
+        auto client = gEnv->getClient();
+        cpp2::ExecutionResponse resp;
+        auto query = "FIND SHORTEST PATH FROM UUID(\"Tim Duncan\") TO UUID(\"Tony Parker\") "
+                     "OVER like UPTO 5 STEPS";
+        auto code = client->execute(query, resp);
+        ASSERT_EQ(cpp2::ErrorCode::E_EXECUTION_ERROR, code);
+        ASSERT_EQ("Please choose a graph space with `USE spaceName' firstly",
+                  *(resp.get_error_msg()));
+
+        // multi sentences
+        query = "USE nba; FIND SHORTEST PATH FROM UUID(\"Tim Duncan\") TO UUID(\"Tony Parker\") "
+                "OVER like UPTO 5 STEPS";
+        code = client->execute(query, resp);
+        ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code) << *(resp.get_error_msg());
+        ASSERT_TRUE(resp.get_rows() != nullptr);
+        ASSERT_EQ(resp.get_rows()->size(), 1);
+    }
 }
 }  // namespace graph
 }  // namespace nebula